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From David Strauss <da...@fourkitchens.com>
Subject Re: Write times
Date Mon, 29 Mar 2010 23:53:24 GMT
The partitioner *is* the method by which Cassandra selects the node to
write to. Even if the client picks a node and requests a write there,
Cassandra will still do the write where it knows it belongs. Every node
is a gateway to do anything, anywhere in the cluster.

On 2010-03-29 23:31, Carlos Sanchez wrote:
> Would it be best then for the client to select the node to write to when using OPP in
order to evenly distributes the keys?
> 
> On Mar 29, 2010, at 6:05 PM, David Timothy Strauss wrote:
> 
>> OPP should only affect write speed if OPP's tendency to unevenly distribute load
causes some nodes to be overworked.
>>
>> In other words, OPP vs. RP on a single node system should have no real effect.
>>
>> -----Original Message-----
>> From: Carlos Sanchez <carlos.sanchez@riskmetrics.com>
>> Date: Mon, 29 Mar 2010 18:58:50
>> To: user@cassandra.apache.org<user@cassandra.apache.org>
>> Subject: Write times
>>
>> Are writes on OrderPreservingPartitioner always slower than RandomPartitioner? Is
the replication factor a 'factor' in the write times?

-- 
David Strauss
   | david@fourkitchens.com
   | +1 512 577 5827 [mobile]
Four Kitchens
   | http://fourkitchens.com
   | +1 512 454 6659 [office]
   | +1 512 870 8453 [direct]


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